"So I was wondering, if you go down and start to get "blown away" what are you supposed to do?
Or is this something you can look ahead for?"
If you mean "is this something you can anticipate happening and plan for?", then the answer is "yes".
Currents in the ocean are always possible, and they have numerous causes. Around wrecks they can be a PITA for the reasons you mention, and many wreck divers have been blown off a wreck by currents.
Gloves are a good idea. Hanging onto something in a current is wise, and glove will keep your hands from getting chewed up.
Ideally you won't drop down onto a wreck if the currents are too strong, but conditions can change throughout a dive, and also it can be difficult from the surface to judge the currents down on the wreck.
Swimming against a current is problematic because you build up CO2, which can cause a number of different consequences that include headaches and blackouts. It may be easier to use a technique called "pull and glide", in which you move across the surface of the wreck by using your hands to pull yourself along. (If the current gets suddenly worse, this technique turns into one called "hanging on for dear life", which sometimes leads to another technique called "praying", but I digress
)
Just like the currents you encountered that blew you into pylons, currents around wrecks can cause surges. Surges can be dangerous because not only can they blow you sideways into rough surfaces and sharp edges, but they can actually suck a diver into a hole in the wreck, and then back out again, as a strong current moves around a part of the wreck and eddies.
As JupiterMermaid mentioned, if you get blown off a wreck, one thing to try is dropping down to the sand on the leeward side of the wreck and attempting to work your way back to the wreck while sheltered from the current somewhat by the wreck itself.
If you do find yourself down-current and helpless, ensure you have a surface marker bouy and signalling items such as a mirror, DiveAlert horn, or other signalling devices. A jonline to connect you and your buddy together will help keep you together while you wait to be picked up.
If currents are really running, don't be afraid to thumb the dive. The best way to handle an emergency is to avoid it in the first place. There will always be another, better day to dive that wreck.
Plan your response to emergencies before the dive. Then if one happens, most of your decision-making will have been considered in advance.
Dive safe,
Doc
